Hydraulic system with a hydromotor fed by a hydraulic transformer

A hydraulic system comprising a high-pressure pipe and a low-pressure pipe, a linear or rotating hydromotor which may be loaded with an alternate load, a hydraulic transformer coupled between the hydromotor, the high-pressure pipe and the low-pressure pipe comprising a housing with a rotor which is rotatable in the housing, a high-pressure connection connected with the high-pressure pipe, a first user's port and a second user's port, chambers distributed around the rotation shaft, driving means which, when the rotor rotates in the housing displace impellers, causing the volume of the chambers to vary between a minimum and a maximum value, channels provided with valves which are activated by the rotation of the rotor and which alternately connect the chambers with the high-pressure connection, the first user's port and the second user's port, and wherein an adjustment device can adjust the circuiting positions of the valves with respect to the rotational position of the driving means, characterized in that switching means are present for connecting the low-pressure pipe with the first user's port or with the second user's port.